Information About

Vexin




The Gaulish Tribe of the Veliocassi , whose capital was at Rouen , gave their name to the region that became known as the Vexin, later to become a county. The Norman incursions under Rollo Of Normandy were halted by the Treaty Of Saint-Clair-sur-Epte in 911 which established the Duchy Of Normandy and fixed its boundary with the territory of the Kingdom of France along the River Epte . This divided the county of Vexin into two parts: